<template>
  <el-container class="home-container">
    <!-- 头部区 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="">
        <span>电商管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button></el-header>
      <!-- 页面主体区 -->
      <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse ? '64px' : '200px'">
          <div class="toggle-button" @click="toggleCollappse">|||</div>
          <!-- 侧边栏菜单区 -->
          <el-menu
            background-color="#545c64"
            text-color="#fff"
            active-text-color="#ffd04b"
            unique-opened
            :collapse="isCollapse"
            :collapse-transition="false"
            router
            :default-active="activePath">
            <!-- 一级菜单 --><!--:index="item.id +''的意思是index只接受字符串，数值拼接一个字符串会变成字符串-->
            <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
              <!-- 一级菜单的模板区域 -->
              <template slot="title">
                <!-- 图标 -->
                <i :class="iconsObj[item.id]"></i>
                <!-- 文本 -->
                <span>{{item.authName}}</span>
              </template>
              <!-- 二级菜单 -->
              <el-menu-item 
              v-for="subItem in item.children" 
              :key="subItem.id" 
              :index="'/' + subItem.path"
              @click="saveNavState('/' + subItem.path)">
                <template slot="title">
                  <!-- 图标 -->
                  <i class="el-icon-menu"></i>
                  <!-- 文本 -->
                  <span>{{subItem.authName}}</span>
                </template>
              </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
        <!-- 右侧内容主体 -->
        <el-main>
          <!-- //路由占位符 -->
          <router-view></router-view>
        </el-main>
      </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      //左侧菜单数据
      menulist: null,
      iconsObj: {
        '125': 'iconfont icon-users',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      //是否折叠侧边栏
      isCollapse: false,
      //被激活的链接
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
  },
  methods: {
    logout() {
      //清除token，重定向到登录页
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    //获取所有对的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      console.log(res);
    },
    //点击菜单的折叠与展开
    toggleCollappse(){
      this.isCollapse = !this.isCollapse
    },
    //保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: rgb(12, 12, 12);
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  //按钮不再上下贴标
  align-items: center;
  color: #fff;
  font-size: 20px;
  >div {
    display: flex;
    align-items: center;
    img {
     width: 60px;
     border-radius: 50%;
   }
   span {
     margin-left: 15px;
   }
  }
  
}
.el-aside {
  background-color: #545c64;
  .el-menu {
    //左侧菜单栏右边框不对齐
    border-right: none;
  }
}
.el-main {
  background-color: rgb(247, 248, 247);
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  //鼠标放上去变成一个小手
  cursor: pointer;
}
</style>